Magnesium Hydroxide Precipitation

MgCl2 + 2NaOH → Mg(OH)2↓ + 2NaCl

概要

Magnesium chloride reacts with sodium hydroxide to form a white precipitate of magnesium hydroxide (Ksp = 5.6 × 10⁻¹²). The milky white suspension is commonly known as milk of magnesia. Mg(OH)₂ is a weak base that slowly neutralizes acid.

参加者

役割 物質 係数 状態
反応物 Sodium Hydroxide NaOH 2 (aq)
生成物 Magnesium Hydroxide Mg(OH)₂ 1 (s)
生成物 Sodium Chloride NaCl 2 (aq)

日常の例

Milk of magnesia antacid is a suspension of this precipitate that neutralizes stomach acid gradually and acts as a gentle laxative.

産業上の重要性

水酸化マグネシウムは制酸薬、難燃剤（ハロゲン化化合物の代替）、廃水処理の中和剤として利用される。海水からの大規模工業的製造も行われている。

特性

タイプ
Precipitation
可逆的
いいえ
エネルギー
発熱性
ΔH
-41.0 kJ/mol

関連する反応

Aluminum Hydroxide Precipitation Barium Sulfate Precipitation Cadmium Sulfide Precipitation (Yellow) Calcium Phosphate Precipitation (Bone Mineral) Chromium(III) Hydroxide Precipitation Lead Carbonate Precipitation Copper Sulfide Precipitation Cobalt(II) Hydroxide Precipitation Mercury(II) Sulfide Precipitation (Vermilion) Iron(III) Hydroxide Precipitation

Frequently Asked Questions

What is the equation for Magnesium Hydroxide Precipitation?
The balanced equation is: MgCl₂ + 2NaOH → Mg(OH)₂↓ + 2NaCl.
What type of reaction is Magnesium Hydroxide Precipitation?
Magnesium Hydroxide Precipitation is a precipitation reaction.
Is Magnesium Hydroxide Precipitation exothermic or endothermic?
Magnesium Hydroxide Precipitation is exothermic (releases energy). The enthalpy change (ΔH) is -41.0 kJ/mol.